From ab70ee9a51750e6c7fc27a30e6345876eefcc2dc Mon Sep 17 00:00:00 2001
From: clerie <git@clerie.de>
Date: Sun, 10 Jan 2021 18:47:11 +0100
Subject: [PATCH] Connect gatekeeper to internal network

---
 hosts/carbon/configuration.nix     |  19 +++++
 hosts/gatekeeper/configuration.nix | 119 ++++++++++++++++++++++++++++-
 hosts/nonat/configuration.nix      |  21 ++++-
 3 files changed, 157 insertions(+), 2 deletions(-)

diff --git a/hosts/carbon/configuration.nix b/hosts/carbon/configuration.nix
index 496db0f..246f916 100644
--- a/hosts/carbon/configuration.nix
+++ b/hosts/carbon/configuration.nix
@@ -46,6 +46,17 @@
 
   networking.wireguard.enable = true;
   networking.wireguard.interfaces = {
+    wg-gatekeeper = {
+      ips = [ "fe80::127:2/64" "169.254.127.2/24" ];
+      peers = [ {
+          allowedIPs = [ "0.0.0.0/0" "::/0" ];
+          endpoint = "gatekeeper.net.clerie.de:50127";
+          publicKey = "y+Bk5eIHgmnq9xuBDD+fk/OIkKRZU6AE4ISx4RdDDyg=";
+          persistentKeepalive = 25;
+      } ];
+      allowedIPsAsRoutes = false;
+      privateKeyFile = "/var/src/secrets/wireguard/wg-gatekeeper";
+    };
     wg-porter = {
       ips = [ "fe80::138:2/64" "169.254.138.2/24" ];
       peers = [ {
@@ -131,6 +142,10 @@
       export all;
     };
     area 0 {
+      interface "wg-gatekeeper" {
+        cost 80;
+        type pointopoint;
+      };
       interface "wg-porter" {
         cost 80;
         type pointopoint;
@@ -145,6 +160,10 @@
       export all;
     };
     area 0 {
+      interface "wg-gatekeeper" {
+        cost 80;
+        type pointopoint;
+      };
       interface "wg-porter" {
         cost 80;
         type pointopoint;
diff --git a/hosts/gatekeeper/configuration.nix b/hosts/gatekeeper/configuration.nix
index 8b1a8ff..252bd5d 100644
--- a/hosts/gatekeeper/configuration.nix
+++ b/hosts/gatekeeper/configuration.nix
@@ -40,6 +40,27 @@
 
   networking.wireguard.enable = true;
   networking.wireguard.interfaces = {
+    wg-carbon = {
+      ips = [ "fe80::127:1/64" "169.254.127.1/24" ];
+      peers = [ {
+          allowedIPs = [ "0.0.0.0/0" "::/0" ];
+          publicKey = "5EVyQC0y704asO4SwsGbAoFGKusuO4a6IJ2bS/5bcTI=";
+      } ];
+      listenPort = 50127;
+      allowedIPsAsRoutes = false;
+      privateKeyFile = "/var/src/secrets/wireguard/wg-carbon";
+    };
+    wg-nonat = {
+      ips = [ "fe80::128:1/64" "169.254.128.1/24" ];
+      peers = [ {
+          allowedIPs = [ "0.0.0.0/0" "::/0" ];
+          endpoint = "nonat.net.clerie.de:50128";
+          publicKey = "0GGDyPj/0uMaba9pmOyj+Sx+3jMivpRdpTJhadl6bS8=";
+      } ];
+      listenPort = 50128;
+      allowedIPsAsRoutes = false;
+      privateKeyFile = "/var/src/secrets/wireguard/wg-nonat";
+    };
     wg-vpn = {
       ips = [ "2a01:4f8:c0c:15f1::8001/113" "10.20.30.1/24" ];
       peers = [
@@ -79,7 +100,7 @@
     };
   };
 
-  networking.firewall.allowedUDPPorts = [ 51820 ];
+  networking.firewall.allowedUDPPorts = [ 50127 50128 51820 ];
 
   clerie.nginx-port-forward = {
     enable = true;
@@ -101,5 +122,101 @@
     };
   };
 
+  petabyte.policyrouting = {
+    enable = true;
+    rules6 = [
+      { rule = "from all to fd00:152:152::/48 lookup 1000"; prio = 10000; } # OSPF
+      { rule = "from fd00:152:152::/48 lookup 2000"; prio = 10000; } # BGP
+      { rule = "from all to fd00:152:152::/48 unreachable"; prio = 20000; }
+    ];
+    rules4 = [
+      { rule = "from all to 10.152.0.0/16 lookup 1000"; prio = 10000; } # OSPF
+      { rule = "from 10.152.0.0/16 lookup 2000"; prio = 10000; } # BGP
+      { rule = "from all to 10.152.0.0/16 unreachable"; prio = 20000; }
+    ];
+  };
+
+  services.bird2.enable = true;
+  services.bird2.config = ''
+  router id ${ (lib.head config.networking.interfaces.lo.ipv4.addresses).address };
+
+  ipv6 table ospf6;
+  ipv4 table ospf4;
+
+  protocol direct {
+    interface "lo";
+    ipv6 {
+      table ospf6;
+    };
+    ipv4 {
+      table ospf4;
+    };
+  }
+
+  protocol kernel kernel_ospf6 {
+    kernel table 1000;
+    ipv6 {
+      table ospf6;
+      export filter {
+        krt_prefsrc=${ (lib.head config.networking.interfaces.lo.ipv6.addresses).address };
+        accept;
+      };
+      import none;
+    };
+  }
+
+  protocol kernel kernel_ospf4 {
+    kernel table 1000;
+    ipv4 {
+      table ospf4;
+      export filter {
+        krt_prefsrc=${ (lib.head config.networking.interfaces.lo.ipv4.addresses).address };
+        accept;
+      };
+      import none;
+    };
+  }
+
+  protocol ospf v3 ospf_6 {
+    ipv6 {
+      table ospf6;
+      import all;
+      export all;
+    };
+    area 0 {
+      interface "wg-carbon" {
+        cost 80;
+        type pointopoint;
+      };
+      interface "wg-nonat" {
+        cost 80;
+        type pointopoint;
+      };
+    };
+  }
+
+  protocol ospf v3 ospf_4 {
+    ipv4 {
+      table ospf4;
+      import all;
+      export all;
+    };
+    area 0 {
+      interface "wg-carbon" {
+        cost 80;
+        type pointopoint;
+      };
+      interface "wg-nonat" {
+        cost 80;
+        type pointopoint;
+      };
+    };
+  }
+
+  protocol device {
+    scan time 10;
+  }
+  '';
+
   system.stateVersion = "21.03";
 }
diff --git a/hosts/nonat/configuration.nix b/hosts/nonat/configuration.nix
index 9980438..9689255 100644
--- a/hosts/nonat/configuration.nix
+++ b/hosts/nonat/configuration.nix
@@ -52,6 +52,17 @@
 
   networking.wireguard.enable = true;
   networking.wireguard.interfaces = {
+    wg-gatekeeper = {
+      ips = [ "fe80::128:2/64" "169.254.128.2/24" ];
+      peers = [ {
+          allowedIPs = [ "0.0.0.0/0" "::/0" ];
+          endpoint = "gatekeeper.net.clerie.de:50128";
+          publicKey = "7QHjiBbWhpOw4OX3Ye58v0YEOqhdfGJSyaHCdiCa20Q=";
+      } ];
+      listenPort = 50128;
+      allowedIPsAsRoutes = false;
+      privateKeyFile = "/var/src/secrets/wireguard/wg-gatekeeper";
+    };
     wg-porter = {
       ips = [ "fe80::1337:2/64" "169.254.137.2/24" ];
       peers = [ {
@@ -65,7 +76,7 @@
     };
   };
 
-  networking.firewall.allowedUDPPorts = [ 51337 ];
+  networking.firewall.allowedUDPPorts = [ 50128 51337 ];
 
   petabyte.policyrouting = {
     enable = true;
@@ -139,6 +150,10 @@
       export all;
     };
     area 0 {
+      interface "wg-gatekeeper" {
+        cost 80;
+        type pointopoint;
+      };
       interface "wg-porter" {
         cost 80;
         type pointopoint;
@@ -153,6 +168,10 @@
       export all;
     };
     area 0 {
+      interface "wg-gatekeeper" {
+        cost 80;
+        type pointopoint;
+      };
       interface "wg-porter" {
         cost 80;
         type pointopoint;